<template>
  <div>
    <el-card class="box-card">
      <div slot="header" class="clearfix header-box">
        <span>文章分类</span>
        <el-button type="primary" size="mini" @click="addVisible = true">添加分类</el-button>
      </div>
      <!-- 表格 -->
      <el-table style="width: 100%" :data="cateList" border stripe>
        <el-table-column label="序号" type="index" width="100"></el-table-column>
        <el-table-column label="分类名称" prop="cate_name"></el-table-column>
        <el-table-column label="分类别名" prop="cate_alias"></el-table-column>
        <el-table-column label="操作">
          <template v-slot="{ row }">
            <el-button type="primary" size="mini" @click="showEdit(row)">修改</el-button>
            <el-button type="danger" size="mini" @click="remove(row.id)">删除</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加分类的对话框 -->
    <el-dialog title="添加文章分类" :visible.sync="addVisible" width="30%" @closed="resetAdd">
      <!-- 添加分类的表单 -->
      <!-- 添加的表单 -->
      <el-form :model="addForm" :rules="addRules" ref="addRef" label-width="70px">
        <el-form-item label="分类名称" prop="cate_name">
          <el-input v-model="addForm.cate_name" minlength="1" maxlength="10"></el-input>
        </el-form-item>
        <el-form-item label="分类别名" prop="cate_alias">
          <el-input v-model="addForm.cate_alias" minlength="1" maxlength="15"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addVisible = false">取 消</el-button>
        <el-button type="primary" size="mini" @click="add">添 加</el-button>
      </span>
    </el-dialog>
    <!-- 添加修改的对话框 -->
    <el-dialog
      title="修改文章分类"
      :visible.sync="editVisible"
      width="30%"
      :close-on-click-modal="false"
      @closed="resetEdit"
    >
      <el-form :model="editForm" :rules="addRules" ref="editFormRef" label-width="100px">
        <el-form-item label="分类名称" prop="cate_name">
          <el-input v-model="editForm.cate_name" minlength="1" maxlength="10"></el-input>
        </el-form-item>
        <el-form-item label="分类别名" prop="cate_alias">
          <el-input v-model="editForm.cate_alias" minlength="1" maxlength="15"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button size="mini" @click="editVisible = false">取消</el-button>
        <el-button type="primary" size="mini" @click="editCate">确定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
import { getCateListAPI, addCateAPI, editCateAPI, deleteCateAPI } from '@/api/cate.js'
export default {
  name: 'ArtCate',
  data() {
    return {
      // 文章分类的列表数据，默认为空数组
      cateList: [],
      // 用来控制添加对话框的显示和隐藏
      // true 表示显示
      // false 表示隐藏
      addVisible: false,
      // 添加表单的数据对象
      addForm: {
        cate_name: '',
        cate_alias: ''
      },
      // 添加表单的验证规则对象
      addRules: {
        cate_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' },
          { pattern: /^\S{1,10}$/, message: '分类名必须是1-10位的非空字符', trigger: 'blur' }
        ],
        cate_alias: [
          { required: true, message: '请输入分类别名', trigger: 'blur' },
          { pattern: /^[a-zA-Z0-9]{1,15}$/, message: '分类别名必须是1-15位的字母数字', trigger: 'blur' }
        ]
      },
      editVisible: false,
      // 修改表单的数据对象
      // 修改表单的数据对象
      editForm: {
        id: '',
        cate_name: '',
        cate_alias: ''
      }
    }
  },
  created() {
    this.initCateList()
  },
  methods: {
    async initCateList() {
      const { data: res } = await getCateListAPI()
      console.log(res)
      if (res.code !== 0) return this.$message.error(res.message)
      this.cateList = res.data
    },
    // 在添加的对话框，关闭之后，重置表单
    resetAdd() {
      this.$refs.addRef.resetFields()
    },
    add() {
      this.$refs.addRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await addCateAPI(this.addForm)
        if (res.code !== 0) return this.$message.error(res.message)
        this.addVisible = false
        this.$message.success(res.message)
        this.initCateList()
      })
    },
    // 修改
    showEdit(obj) {
      if (obj.id === 1 || obj.id === 2) {
        this.$message.error('不允许修改')
        return
      }
      this.editVisible = true
      this.editForm = { ...obj }
    },
    resetEdit() {
      this.$refs.editFormRef.resetFields()
    },
    // 修改分类
    editCate() {
      // 1. 表单预验证
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return

        // 2. 发起请求
        const { data: res } = await editCateAPI(this.editForm)
        // 3. 修改失败
        if (res.code !== 0) return this.$message.error(res.message)
        // 4. 修改成功：提示用户、关闭对话框、刷新列表数据
        this.$message.success(res.message)
        this.editVisible = false
        this.initCateList()
      })
    },
    // 删除
    async remove(id) {
      // 不允许删除前两个分类
      if (id === 1 || id === 2) return this.$message.error('管理员不允许删除这个分类！')

      // 询问用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该分类, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult === 'cancel') return

      // 发起请求删除对应的分类
      const { data: res } = await deleteCateAPI(id)

      // 判断是否删除成功
      if (res.code !== 0) return this.$message.error(res.error)
      this.$message.success(res.message)
      this.initCateList()
    }
  }
}
</script>

<style lang="less" scoped>
.header-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
</style>
